I live in northern Alberta. Recently a creek behind my house has been overrun by minnows. It never has had fish before. I have heard they are rainbow brown hybrids but I have also heard they are suckers. What do you all think?

I am thinking its a Pearl Dace - hard to tell for sure just like everyone else, but the black nose daces' lateral line extends through they eye and to the nose. It doesn't appear to happen in this case.

This is a classic example of when it is good to stick with a generalization I have seen fish just like that pictured but failed to try identification of them. It was the fact that I didn't know the difference between the various sub species of dace that I just said 'Dace' Honestly I didn't know there was a Pearl Dace, so through the thread and the research of Greg and others I've learned something here